The current first comment:

It's a straight up ad-hominem attack against Justin Keller, instead of criticising [sic] his writing it attacks his character.

That's just as fallacious an invocation of ad hominem as your link was. Description of questionable behavior is not fallacious, in an article the purpose of which is to complain about questionable behavior. Likewise, it is entirely reasonable to expect withering unsupported criticism like yours to spring from some a personal position of some relevant experience.